VMWare will NOT let you change the VENDORID part of your generated MAC address. Well you can edit the VMX file but either the server won't boot or the NIC won't work - it's been about a year since i tried so i cant remember the failure behavior.
What you will need to do is spoof the mac address in windows I haven't done this in windows only *nix but a quick google led me to this link that seems pretty accurate (and since it claims to work in XP should be the same as 2k3) although a bit dated.
You will have to access the information available on your managed switches. If you have an unmanaged network, I don't see a way to do that.
This is assuming the target computers are capable of Wake-on-LAN (WoL). In this case, a link to the server is established (look for the flashy link LED), and the network card is listening to WoL broadcasts. AFAIK, the card does not answer to anything in this state.
If there isn't any WoL, the card most probably is off (no link LED), and it won't work at all.
Best Answer
I think it applies to any windows.
You will see all required info.